Form: They are 11~14mm. The color is wholly light brown. They are similar to cockroach but the stripe on their front chest is more thick and dark.

Other characters: They usually live in the bottom of forests or fallen leaves. You can see them From June to October. They go through winter as a larva. In winter, you can see the larvas when you raise leaves on the ground. They experience incomplete matamorphosis. They are wild animals so they don’t come in home. In Dongbaekdongsan(Gotzawal in Jeju), they can be seen anywhere(easily), especially in non-moist leaves.